A box contains 20 red balls and 30 black balls. Four balls are chosen without replacement. What is the chance that:

- all balls are red
- exactly three balls are red
- the first red ball appears on the last draw.
- the fist two balls are the same color

Learning probability by doing !

A box contains 20 red balls and 30 black balls. Four balls are chosen without replacement. What is the chance that:

- all balls are red
- exactly three balls are red
- the first red ball appears on the last draw.
- the fist two balls are the same color

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